Everybody has different sexual fetishes, most of which are not by any choice of the person who has them.
As long as they refuse to act upon/support people acting upon these fantasies, there is no logical reason to get so... angry? bitter? Not honestly sure what emotion describes your reaction...

>you people
I ain't one of the people fapping to animals. I prefer white, straight humans.
I'm just saying, if something doesn't effect you, and doesn't really hurt anyone, you should try to ignore it.
Besides, we all have our own ****** up bits of our personality, whether we know it or not, some people just have those bits in the sexual part of their personality.